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用衰减全反射傅里叶变换红外光谱技术对26个浓度范围为0.03～6mg/kg的毒死蜱溶液和20个浓度范围为2～20mg/kg的炔螨特溶液进行定量快速检测。其中,两种农药溶液分别随机抽取5个样本作为预测集。采用差谱、基线校正和矢量归一化对光谱数据进行预处理,分别建立了以峰面积和峰高与浓度的定量分析模型,以峰面积建立定量模型的毒死蜱和炔螨特溶液的相关系数分别为0.995 8和0.989 5,RMSEC分别为0.168 5,0.643 2,RMSEP分别为0.196 5,1.125 6;以峰高建立定量模型的毒死蜱和炔螨特溶液的相关系数分别为0.9975,0.987 1,RMSEC分别为0.130 5,0.712 8,RMSEP分别为0.268 6,1.183 1。实验结果表明,衰减全反射傅里叶变换红外光谱技术可用于农药溶液的快速初步测定。
Twenty-six chlorpyrifos solutions in the concentration range of 0.03-6 mg / kg and 20 propargite solution solutions in the concentration range of 2-20 mg / kg were quantified and tested rapidly with attenuated total reflectance Fourier transform infrared spectroscopy. Among them, the two pesticide solutions were randomly selected five samples as a prediction set. The spectral data were preprocessed by difference spectrum, baseline correction and vector normalization. The quantitative models of peak area and peak height and concentration were established respectively. Correlation coefficients of chlorpyrifos and propargite were established by the peak area. RMSEC were 0.168 5,0.643 2 and RMSEP were 0.196 5 and 1.125 6 respectively. The correlation coefficients of chlorpyrifos and propargite were 0.9975 and 0.9887 respectively, and the correlation coefficients of RMSEC Respectively 0.130 5,0.712 8, RMSEP respectively 0.268 6,1.183 1. The experimental results show that attenuated total reflectance Fourier transform infrared spectroscopy can be used for the rapid preliminary determination of pesticide solution.